a(n) = 900*n^2 + 30.

Terms

a(0) =30a(1) =930a(2) =3630a(3) =8130a(4) =14430a(5) =22530a(6) =32430a(7) =44130a(8) =57630a(9) =72930a(10) =90030a(11) =108930a(12) =129630a(13) =152130a(14) =176430a(15) =202530a(16) =230430a(17) =260130a(18) =291630a(19) =324930a(20) =360030a(21) =396930a(22) =435630a(23) =476130a(24) =518430a(25) =562530a(26) =608430a(27) =656130a(28) =705630a(29) =756930